Take-up mechanism



(No Model.)

P. L. ALLEY.

TAKE-UP MECHANISM.

Q9 aM/Z Z Patented De0.21, 1897.

UNITED STATES PATENT OFFICE;

FREDERICK. L. ALLEY, OF LYNN ,MASSACHUSETTS.

TAKE -UP MECHANISM.

SPECIFICATION forming part of Letters Patent No. 595,802, dated December 21, 1897. Application filed October 20,1896. Serial No. 609,472. (No model.)

To all whom it may concern.-

Be it known that I, FREDERICK L. ALLEY, a citizen of the United States, residing at Lynn, in the county of Essex and State'of Massachusetts, have invented certain new and useful Improvements in Take-Up Mechanisms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to take-up mechanisms for sewing-machines, and more particularly to that class of take-ups arranged to be movable about a center having either a rotary or oscillating movement, the present invention consisting in an improved arrangement of the thread-guard whereby the thread is retained upon the take-up.

The invention as applied to a rotary takeup is illustrated in the accompanying drawings, in which- Figure 1 represents in side elevation the take-up in its lowest position. Figs. 2 and 3 are front views of the improved take-up, showing the take-up in dilferent positions along its path of rotation and different positions of the actuating mechanism which imparts a variable angular velocity to the take-up, said figures further illustrating, diagrammatically, the relative positions of the shuttle, material, thread-guides, and tension.

In the drawings, Arepresents the take-up, which comprises a rotary arm'a, upon which is mounted a thread-carrier a, conveniently provided with a thread-roll a about which runs the thread 8.

The thread 8 is held upon the thread-roll a by What I term a thread-guard CL ,WI1IGh,

as shown, partially surrounds and overlaps the thread-roll a In order that the thread 8 may not become wound about or caught upon the thread-guard a and so impede the successful operation of the device or the pas sage of thread through same, I have arranged the thread-guard a to present the same side in the direction of the pull of the thread for any position of the arm a or to always cause it to remain up and over the take-up. I accomplish the result above suggested by arranging thread-guard C63 to rotate about an axis of its own, making one revolution about such axis for every rotation of the arm a.

As shown in the drawings, the thread-guard a is secured to the carrier a,which is mounted upon and rotates with a short shaft projected through a suitable bearing a in the arm a and carrying on the opposite side thereof a gear 9, meshing with a gear 10, connected/by a short shaft mounted in a suitable bearing a on arm a with a gear 11, meshing with a gear 12 on sleeve 13,which surrounds the shaft B, by which the arm a is rotated, and is fixedly secured to a fixed'portion 14 of the machine.

In the diagrammatical portions of Figs. 2 and 3, 2 represents the tension; '3, 4E, and 5, the thread-guides; 6, the material in which the stitch is to be formed, and 7 the'shuttle.

The arm a is mounted upon and rotates with a shaft B,which is supported in suitable bearings and which carries a pair of broken gears b and b of different diameters, which rotate therewith. The broken gears 19 and b are engaged by a pair of similar gears d and cl on the shaft D, which is the power-shaft of the machine,ora shaftin operative connection therewith.

It is evident that by varying the form and arrangement of gears 19, b, d, and d the angu-v lar velocity and variations in the angular velocity of the take-up rotated thereby may be regulated with reference to the operation of the other features of the stitch-forming mechanism.

In connection with the foregoing description of the mechanism for actuating the arm a I desire to say that the same forms no essential part of the present invention, and any convenient or suitable mechanism may be substituted therefor.

The operation of the device is as follows: Motion being imparted to the shaft D and the thread 8 being engaged with the take-up, as shown, the gears d and cl on shaft D, engaging with the gears b and b on shaft B, impart to said shaft a fast-and-slow motion, which in turn is imparted to the arm and take-up carried by said shaft. As the arm a and take-up ct rotate around the shaft B as a center the thread-guard of, by means of the gears 9, 10, 11, and 12, is caused to revolve about its center, and thus to retain a substantially fixed position with reference to the take-up, which, as shown in the drawings, is at the upper side of the take-up over the thread thereon, and will therefore not interfere with the passage of the thread through the take-up nor permit it to become disen gaged from or entangled with the take-up or thread-guard.

Having fully described my invention and its mode of operation, I desire to say that I do not consider my present invention as limited to the application thereof herein shown and described, for in so far as I am at present advised of the state of the art I am the first to provide a rotary or an oscillating takeup with a movable thread-guard which shall maintain its fixed angular position relative to the centerof motion of the take-up during the rotation or oscillation of the take-u p.

I therefore claim as novel and desire to secure by Letters Patent of the United States- 1. In a take-upmechanism, a take-up movable about a center, means to actuate the; takeup, a movable thread-guard on said takeup and means to maintainthe thread-guard i in a substantially fixed angular position relative to the center-of motion of the take-up, Y

substantially as described.

2. In a take-up mechanism, aitake-up movable about a center, means to actuate the take-up, and a threadguardon said take-up movable about the center of motion of the m cans to rotate it,and a movable thread-guard upon said take-up and gear connections between said thread-guard and a fixed portion of the machine, whereby upon a rotation of the take-up the thread-guard will retain a substantially fixed angular position relative to the center of motion of the take-up, substantially as described.

5. In a take-up mechanism, the combination with a take-up arm movable about a center and means to actuatesaid arm, of a threadroll on the outer end of said arm, a threadguard on said arm and movable therewith,

and means to maintain the thread-guard over and above the thread-roll during the movement of the take-up arm, substantially as described.

In testimony whereof I affix my signature in'presence of two witnesses.

' FREDERICK L. ALLEY.

WVitnesses: T. HART ANDERSON, JOHN J. COLLINS. 

